# cloudwego/volo

Rust RPC framework with high-performance and strong-extensibility for building micro-services.

Repository: https://github.com/cloudwego/volo
Canonical: https://ross.abutalabs.com/products/volo
Homepage: https://crates.io/crates/volo
Language: Rust
License: Apache-2.0
License Family: permissive
Topics: grpc, protobuf, rpc, rust, thrift, async
Last push: 2026-08-25T09:21:15+00:00

## Health v2 (maintenance only)
Score: 88/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 68, longevity 100
- inputs: {"age_days": 1575, "days_push": 8, "days_rel": 212, "gap_med": 7.0, "n_releases_24m": 17}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2619, forks 220 (observed 2026-08-28T04:07:04.906316+00:00)

## What it is
Volo is a high-performance, strongly extensible RPC framework written in Rust for building microservices. It provides Thrift, gRPC, and HTTP implementations, IDL-driven code generation, and a middleware abstraction powered by AFIT and RPITIT.

## Use cases
- build microservices in rust with rpc
- serve and call thrift rpc services
- build grpc servers and clients in rust
- generate rust code from thrift and protobuf idl
- build high-performance http services in rust
- bootstrap a new rust rpc project from the command line

## When to choose
- you are building microservices in Rust and want a mature RPC framework
- you need Thrift or gRPC support with IDL-based code generation
- performance and low allocation overhead are priorities
- you want an extensible middleware abstraction

## When to avoid
- your stack is not Rust
- you need a simple REST-only service with minimal framework overhead
- you rely on an ecosystem of RPC features available only in Go or Java frameworks

## Facets
- artifact type: framework
- maturity: active
- function: rpc, middleware, web-framework, http-server, http-client, serialization, cli
- domain: microservices, backend, apis, web-development, developer-tools
- platform: rust, cross-platform, cli
- tags: grpc, thrift, protobuf, async, afit, rpitit, code-generation, microservices

## Member repositories
- cloudwego/volo (main) score 88

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:04.906316+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T02:20:12.184345+00:00, confidence not recorded.
  - readme: https://github.com/cloudwego/volo (fetched 2026-08-28T04:07:04.906316+00:00, sha 1398c3463814)
  - registry_crates: https://crates.io/api/v1/crates/volo (fetched 2026-08-29T10:03:08.248759+00:00, sha af33531e47a1)
- Data as of 2026-08-30T08:39:29.467469+00:00.